CN108266527B - Air valve double-control shifting fork shaft assembly - Google Patents
Air valve double-control shifting fork shaft assembly Download PDFInfo
- Publication number
- CN108266527B CN108266527B CN201810231766.9A CN201810231766A CN108266527B CN 108266527 B CN108266527 B CN 108266527B CN 201810231766 A CN201810231766 A CN 201810231766A CN 108266527 B CN108266527 B CN 108266527B
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- hole
- shifting fork
- pin
- control
- fork shaft
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses an air valve double-control shifting fork shaft assembly, which belongs to the technical field of speed changers and comprises a shifting fork shaft, wherein a long hole with one end being closed along the axial direction is formed in the shifting fork shaft, a return spring and a push rod are installed in the long hole, the return spring is located at the closed end of the long hole, the push rod is located at the open end of the long hole, a radial through hole is formed in the side wall of the long hole, a push pin is installed in the radial through hole, a pin hole is formed in the push rod, one end of the push pin is located in the pin hole when the push rod is not stressed, and the push rod pushes the push pin to move when the push rod is subjected to axial force to move along the axial direction. The ejector pin is pushed by the ejector rod to control the gas circuit control valve, the ejector rod is pushed by the return spring to return, and the control of the gas circuit control valve is realized when the piston is static to the power takeoff with the rear, namely the middle position cylinder structure, and the control valve is simple in structure, high in reliability and low in cost.
Description
Technical Field
The invention relates to the technical field of speed changers, in particular to an air valve double-control shifting fork shaft assembly.
Background
For a multi-gear mechanical transmission with a main and auxiliary box structure, the auxiliary box synchronizer is ensured to be in gear when the main box is in gear, and the multi-gear mechanical transmission is based on safety and an important design for protecting the auxiliary box synchronizer. For a newly developed speed changer, a mechanical interlocking structure is generally adopted; however, for the improvement of mature products, a pneumatic interlocking structure is generally adopted, the pneumatic interlocking structure is simple, and the main box and the auxiliary box are not mutually interfered and are easy to assemble and disassemble. However, for a transmission with a rear power takeoff, namely a middle position cylinder structure, a mechanical interlocking structure cannot be adopted at present due to the structure of a secondary box and the like; for the pneumatic interlocking structure, the pneumatic interlocking structure is realized by adding a power takeoff and an interlocking control air valve or modifying an air circuit control scheme at present; this tends to increase the complexity of controlling the gas circuit, reduce the reliability of the system, and increase the initial installation and maintenance costs.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the air valve double-control shifting fork shaft assembly, which can solve the problems of complex control air path, low reliability and high cost caused by the adoption of a pneumatic interlocking structure in a transmission with a rear power takeoff, namely a middle position air cylinder structure.
The invention is realized by the following technical scheme:
the utility model provides a pneumatic valve double control shifting fork axle assembly, includes the shifting fork axle, be provided with the one end confined slot hole along axial on the shifting fork axle, install return spring and ejector pin in the slot hole, return spring is located the blind end of slot hole, the ejector pin is located the open end of slot hole, be provided with radial through-hole on the lateral wall of slot hole, install the knock pin in the radial through-hole, be provided with the pinhole on the ejector pin, when the ejector pin is unstressed, one end of knock pin is located the pinhole, when the ejector pin receives axial force along axial motion, the ejector pin promotes the knock pin motion, and then control gas circuit control valve.
Optionally, be provided with first conical surface on the pinhole, be provided with on the knock pin with first conical surface complex second conical surface, when the ejector pin receives axial force along axial motion, first conical surface promotes the second conical surface and makes the knock pin motion.
Optionally, the radial through hole is arranged on the shifting fork shaft and at a position corresponding to the ejector rod of the air path control valve.
Optionally, a sealing groove is arranged at one end of the ejector rod close to the opening of the long hole, and a sealing ring is arranged in the sealing groove to ensure the sealing of the ejector rod and the shifting fork shaft.
Optionally, one end of the return spring is in contact connection with the closed end of the long hole, and the other end of the return spring is in contact connection with the ejector rod.
Optionally, when the knock pin is positioned in the pin bore, the return spring is in a free state.
Optionally, one end of the air valve double-control shifting fork shaft assembly is connected with a transmission shifting fork, the other end of the air valve double-control shifting fork shaft assembly is positioned in the cylinder body, the shifting fork shaft is fixedly connected with the piston, and the end part of the air valve double-control shifting fork shaft assembly positioned at one end of the cylinder body is contacted with the cylinder piston at the middle position.
Optionally, the shift fork shaft is a stepped shaft, and one side of the piston is positioned through a shaft shoulder and the other side is positioned through a nut.
Optionally, a conical groove is arranged at the radial through hole of the shifting fork shaft, and the conical groove is used for pushing the air passage control valve ejector rod.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses an air valve double-control shifting fork shaft assembly, which comprises a shifting fork shaft, wherein a long hole with one end being closed along the axial direction is formed in the shifting fork shaft, a return spring and a push rod are arranged in the long hole, the return spring is positioned at the closed end of the long hole, the push rod is positioned at the open end of the long hole, a radial through hole is formed in the side wall of the long hole, a push pin is arranged in the radial through hole, a pin hole is formed in the push rod, when the push rod is not stressed, one end of the push pin is positioned in the pin hole, and when the push rod is subjected to axial force to axially move, the push rod pushes the push pin to move. The ejector pin is pushed by the ejector rod to control the gas circuit control valve, the ejector rod is pushed by the return spring to return, and the control of the gas circuit control valve is realized when the piston is static to the power takeoff with the rear, namely the middle position cylinder structure, and the control valve is simple in structure, high in reliability and low in cost.
Further, through setting up first conical surface on the pinhole, set up the second conical surface on the knock pin, first conical surface and second conical surface cooperation use have realized, promote the knock pin motion when the ejector pin moves, simple structure, the reliability is high.
Drawings
FIG. 1 is a schematic diagram of a dual control shift rail assembly for an air valve according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a partial structure of a dual control shift rail assembly for an air valve according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along the M-M direction in FIG. 2;
fig. 4 is a use state diagram of a gas valve double-control shifting fork shaft assembly according to an embodiment of the present invention.
In the figure: the automatic transmission comprises a transmission shifting fork 1, a shell 2, a gas circuit control valve 3, a cylinder body 4, a piston 5, a middle position cylinder piston 6, a gas valve double-control shifting fork shaft assembly 7, a shifting fork shaft 8, a return spring 9, a jacking pin 10, a push rod 11 and an O-shaped sealing ring 12.
Detailed Description
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
As shown in fig. 1 and 2, an air valve double-control shifting fork shaft assembly comprises a shifting fork shaft 8, a long hole with one end being closed along the axial direction is formed in the shifting fork shaft 8, a return spring 9 and a push rod 11 are installed in the long hole, the return spring 9 is located at the closed end of the long hole, the push rod 11 is located at the open end of the long hole, a radial through hole is formed in the side wall of the long hole, a push pin 10 is installed in the radial through hole, a pin hole is formed in the push rod 11, when the push rod 11 is not stressed, one end of the push pin 10 is located in the pin hole, and when the push rod 11 is subjected to axial force and moves along the axial direction, the push rod 11 pushes the push pin 10 to move, and then the air path control valve 3 is controlled.
The pin hole is provided with a first conical surface, the ejector pin 10 is provided with a second conical surface matched with the first conical surface, and when the ejector rod 11 is axially moved by axial force, the first conical surface pushes the second conical surface to enable the ejector pin 10 to move.
As shown in fig. 3, radial through holes are provided on the shift rail 8 at positions corresponding to the air path control valve jack. One end of the ejector rod 11, which is close to the opening of the long hole, is provided with a sealing groove, and a sealing ring is arranged in the sealing groove to ensure the sealing of the ejector rod 11 and the shifting fork shaft 8.
One end of the return spring 9 is connected with the closed end of the long hole in a contact way, and the other end of the return spring is connected with the ejector rod 11 in a contact way. When the knock pin 10 is located in the pin hole, the return spring 9 is in a free state.
As shown in fig. 4, one end of the air valve double-control shifting fork shaft assembly is connected with a transmission shifting fork 1, the other end of the air valve double-control shifting fork shaft assembly is positioned in the cylinder body 4, the shifting fork shaft 8 is fixedly connected with a piston 5, and the end part of one end of the air valve double-control shifting fork shaft assembly positioned in the cylinder body 4 is contacted with a cylinder piston 6 at the middle position.
Wherein, the shifting fork shaft 8 is a stepped shaft, and one side of the piston 5 is positioned by a shaft shoulder and the other side is positioned by a nut. The radial through hole of the shifting fork shaft 8 is provided with a conical groove which is used for pushing the air passage control valve ejector rod.
The working process of the air valve double-control shifting fork shaft assembly provided by the embodiment of the invention is as follows:
as shown in fig. 4, the left end of the air valve double-control shifting fork shaft assembly is connected with a transmission shifting fork 1 for gear engagement, the right side of the air valve double-control shifting fork shaft assembly is arranged in a cylinder body 4 and is connected with a piston 5 through a nut, and the right end of the air valve double-control shifting fork shaft assembly can be contacted with a cylinder piston 6 at the middle position; the air passage control valve 3 is arranged on the shell 2, and the ejector rod 11 of the air passage control valve is contacted with the slotting position of the shifting fork shaft 8. The cylinder block 4 is assembled in the housing 2 as a single body. When the piston 5 moves left and right under the action of air pressure, the shifting fork shaft assembly is driven to move left and right, wherein the left side is provided with a low-gear L in the right direction, and the right side is provided with a high-gear H in the left direction. The grooving on the shifting fork shaft 8 controls the valve ejector rod of the air passage, thus realizing air passage control. When the vehicle control switch is turned on and the cylinder piston 6 at the middle position is at the position shown in fig. 3, the piston 5 and the shifting fork shaft assembly stop at the middle position in the drawing under the action of air pressure, and the function of pressing down the ejector rod of the air passage control valve is needed.
The shifting fork shaft 8 is provided with a long hole, wherein a return spring 9 and a push rod 11 are sequentially assembled, the push rod 11 is grooved and sleeved with a gas circuit control valve push rod, and the push rod is matched with an inner hole of the shifting fork shaft 8, so that translation, return and sealing of the push rod 11 after being pressed are realized. The position of the shifting fork shaft 8 corresponding to the ejector rod of the air channel control valve is slotted, holes are machined, ejector pins 10 are assembled in the slots, the lower ends of the ejector pins 10 extend into through holes of the ejector rods 11 and are used for limiting and preventing rotation, meanwhile, the conical surfaces of the ejector pins 10 are matched with the conical surfaces of the ejector rods 11, when the right side of the ejector rods 11 is pressed, the ejector rods 11 push the ejector pins 10, and the ejector rods of the air channel control valve realize second heavy control of the air channel. Then when the right pressure of the ejector rod 11, namely the cylinder piston 6 at the middle position is withdrawn, the ejector rod 11 can return under the action of the return spring 9, so that the ejector pin 10 can return easily under the action of the ejector rod 11 of the gas circuit control valve 3, and the on-off of the gas circuit control valve 3 is not influenced.
Compared with the existing shifting fork shaft, the shifting fork shaft is changed into a shifting fork shaft assembly, namely, the dual control of the air valve ejector rod is realized, namely, when the ejector rod is pushed by no external force, the ejector pin is sunk into the shaft hole of the shifting fork, and meanwhile, the ejector rod is blocked to prevent the ejector rod from being ejected, and when the shifting fork shaft moves left and right, the control groove normally controls the air valve ejector rod; when the ejector rod is pushed by external force, the ejector pin is withdrawn by the ejector rod, and the air valve ejector rod is pressed, so that the second control is realized.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The utility model provides a pneumatic valve double control shifting fork axle assembly, its characterized in that, includes shifting fork axle (8), be provided with on shifting fork axle (8) along the confined slot hole of axial one end, install return spring (9) and ejector pin (11) in the slot hole, return spring (9) are located the blind end of slot hole, ejector pin (11) are located the open end of slot hole, be provided with radial through-hole on the lateral wall of slot hole, install ejector pin (10) in the radial through-hole, be provided with the pinhole on ejector pin (11), when ejector pin (11) are unstressed, one end of ejector pin (10) is located the pinhole, when ejector pin (11) receive axial force along axial motion, ejector pin (11) promote ejector pin (10) motion, and then control gas circuit control valve (3).
2. The air valve double-control shifting fork shaft assembly according to claim 1, wherein a first conical surface is arranged on the pin hole, a second conical surface matched with the first conical surface is arranged on the ejector pin (10), and when the ejector pin (11) is axially moved by axial force, the second conical surface is pushed by the first conical surface so that the ejector pin (10) moves.
3. A gas valve double control shift rail assembly according to claim 1, characterized in that the radial through hole is provided in the shift rail (8) at a position corresponding to the gas control valve carrier.
4. The air valve double-control shifting fork shaft assembly according to claim 1, wherein a sealing groove is formed in one end, close to the opening of the long hole, of the ejector rod (11), and a sealing ring is arranged in the sealing groove to ensure sealing of the ejector rod (11) and the shifting fork shaft (8).
5. A gas valve double control shift rail assembly according to claim 1, characterized in that one end of the return spring (9) is in contact connection with the closed end of the elongated hole, and the other end is in contact connection with the carrier rod (11).
6. A gas valve double control shift rail assembly according to claim 5, characterized in that the return spring (9) is in a free state when the top pin (10) is located in the pin hole.
7. A gas valve double control shift fork assembly as claimed in claim 1, characterized in that one end of the gas valve double control shift fork assembly is connected with a transmission shift fork (1), the other end of the gas valve double control shift fork assembly is positioned in the cylinder block (4), the shift fork shaft (8) is fixedly connected with the piston (5), and the end part of the gas valve double control shift fork assembly positioned at one end in the cylinder block (4) is contacted with the cylinder piston (6) at the middle position.
8. A gas valve double control shift rail assembly according to claim 7, characterized in that the shift rail (8) is a stepped shaft, one side of the piston (5) being positioned by means of a shoulder and the other side being positioned by means of a nut.
9. The air valve double-control shifting fork shaft assembly according to claim 1, wherein a conical groove is formed in a radial through hole of the shifting fork shaft (8) and used for pushing an air passage control valve ejector rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231766.9A CN108266527B (en) | 2018-03-20 | 2018-03-20 | Air valve double-control shifting fork shaft assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231766.9A CN108266527B (en) | 2018-03-20 | 2018-03-20 | Air valve double-control shifting fork shaft assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108266527A CN108266527A (en) | 2018-07-10 |
| CN108266527B true CN108266527B (en) | 2023-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810231766.9A Active CN108266527B (en) | 2018-03-20 | 2018-03-20 | Air valve double-control shifting fork shaft assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108266527B (en) |
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| CN108266527A (en) | 2018-07-10 |
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